All the Proof You need

Find a FENSA Approved Installer

Each FENSA Approved Installer, from large national brands to small local companies, is assessed regularly by us to ensure its compliance to building regulations is continually maintained. Find your nearest approved installer today to start your home improvements!

Installer Name
FENSA Registration No.

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Replacing windows or doors?


Remember to ask for a FENSA certificate

Before appointing an installer to replace windows or doors, check you'll get a FENSA certificate when the work's complete.

It's all the proof you need.


Become FENSA Approved

Boost your business for less than you think and reassure customers they’ll receive a FENSA certificate when the job’s done.

Join Fensa

What homeowners need to know

Buying or selling a property?

Check if the windows and doors were registered by FENSA and reorder your FENSA certificate if it's lost.

Harry's Advice

Harry is on a mission to help professionalise installers and protect homeowners across the UK.

How to find a window or door installer you can trust

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